info:eu-repo/semantics/article
Changing tectonic regimes in the central Costa Rica forearc between the Paleogene and the present: Insights from structural analysis and focal mechanisms
Fecha
2021-01Registro en:
Porras, Hernán; Mescua, Jose Francisco; Durán, Patrick; Cascante, Monserrat; Giambiagi, Laura Beatriz; et al.; Changing tectonic regimes in the central Costa Rica forearc between the Paleogene and the present: Insights from structural analysis and focal mechanisms; Pergamon-Elsevier Science Ltd; Journal of Geodynamics; 143; 1-2021; 1-12
0264-3707
CONICET Digital
CONICET
Autor
Porras, Hernán
Mescua, Jose Francisco
Durán, Patrick
Cascante, Monserrat
Giambiagi, Laura Beatriz
Muller, Cyril
Resumen
We discuss the Cenozoic history of the Central Costa Rica forearc, between 10° and 9°30′N, based on geological mapping, fault slip data and seismological records.The temporal variability in the regional stress-field suggests a variable and complex deformation pattern. The first stage of deformation, from the Paleogene to early Miocene, was controlled by an extensional regime in the forearc. Afterwards, a change to orthogonal convergence triggered a contractional deformation and subsequent inversion of the sedimentary extensional basins in the middle-upper Miocene. Finally, a transpressive regime has been developed since the Pliocene.